adjustbars.js Example File

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 /* JavaScript functions for creating, handling and
  * destroying the bars of the adjuster component. */

 var maxBars = 10;
 var firstBarHeight = 5;
 var bars = new Array(maxBars);
 var colors = new Array(maxBars);
 var barWidthFactor = 2.3;

 function createBars() {
     var barWidth = adjuster.width/maxBars/barWidthFactor;
     for (var i = 1; i <= maxBars; i++) {
         //Create, configure and store the bars.
         var bar = Qt.createQmlObject('import QtQuick 1.0; Rectangle {smooth: true}', adjuster, "dynamicBar");
         bar.width = barWidth;
         bar.height = firstBarHeight+(i/maxBars)*(adjuster.height*0.8-firstBarHeight);
         bar.radius = bar.width/2;
         bar.x = (i-1)*(barWidthFactor*barWidth);
         bar.y = adjuster.height/2 - bar.height/2;
         bars[i-1] = bar;

         //Calculate and store the colors
         if (i < maxBars/2) {
             colors[i-1] = Qt.rgba(1-i/(maxBars/2), 1, 1-i/(maxBars/2), i);
         }
         else {
             colors[i-1] = Qt.rgba((i-(maxBars/2))/(maxBars/2), 1-((i-(maxBars/2))/(maxBars/2)), 0, i);
         }
     }
 }

 function destroyBars() {
     for (var i = 0; i < maxBars; i++) {
         bars[i].color = "transparent" //Colors must be set to transparent or otherwise the bars will stay appeared.
         bars[i].destroy();
     }
 }

 function fillBars(barNumber) {
     //Set the color for the bars (transparent from the selected bar to the end).
     for (var i = 0; i < maxBars; i++) {
         if (i < barNumber) {
             bars[i].color = colors[i];
         }
         else {
             bars[i].color = "black";
         }
     }
 }